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BrandNational Union Radio Corporation
ClassTwin Triode Amplifier
BaseLoctal 8-Pin
Construction
Primary TypeTriode
EnvelopeT-9
SectionsTwin
Filament / Heater
MaterialCoated
Absolute Maximum Ratings
Plate Voltage110 V
Audio Performance
Key Features
- Twin Triode
- Battery Operated
- Loctal Base
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Series Filament | 90V | 1300 | 11200 | 14.5 | 4.5mA |
| Parallel Filament (0V Bias) | 90V | 1300 | 11200 | 14.5 | 4.5mA |
| Parallel Filament (-3V Bias) | 90V | 760 | 19000 | 14.5 | 1.1mA |
Application Notes
Section 2 is recommended for the oscillator which should be grid leak returned properly to avoid oscillator starting difficulties. Both grids returned to Pin 8.
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